Create Icons to Start the Screensaver on Windows 7
Right-click on the desktop and choose New \ Shortcut from the menu.
%systemroot%\system32\Bubbles.scr /s
If you don’t know the filename, you can browse down to your system32 folder and then search for “.scr” using the search box:
You should see all of the names of all the screensavers installed on your system, which you can use in the location field.